On Fri, 6 Oct 2023 20:09:09 +0000 Sam Andrew <samandrew at microsoft.com> wrote: > + > + if (dev->data->dev_started) { > + PMD_DRV_LOG(ERR, "Device must be stopped before changing MTU"); > + return -EIO; > + } > + According to rte_ethdev.h this should -EBUSY